Machine for applying ferrules.



PATENTED OCT. '13, 1903.

G. H. P. SGHRADBR. MACHINE P03 APPLYING PERRULBS, Y

APPLICATION FILED HAE. 31| 1902.

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UNITED STATES Patented October S, 19.

`'PATENT ritieni MACHINE FOR APPLYING FERRULES..

SPECIFICATION forming part 0f Letters Patent No. 741,073, dated October 13, 1903.

pplication leddlilareh 31, 1902. Serial No. 100,884. (No model) T0 MIZ whom it may concern:

Be it known that I, GEORGE H. F. SCHRA DER, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Machines for Applying Ferrules, of which the following is a specification.

My invention aims to provide a machine for applying a ferrule to a compressible tube, such as the ordinary smallrubber tube to which the valve of a pneumatic tire is fastened or such as the ordinary rubber or other hose to the end of which a nozzle or coupling is to be attached. The machine of the present application contains improvements in this class of machines generally and is specially adapted to carry out the process ot' applying ferrules described in my application for patent, Serial N o. 100,339,-iled March 27, 1902.

With this end in View my invention aims to provide a machine which may be cheaply constructed by means of which ferrules can be applied perfectly and expeditiously and which is easily adjusted to meet diering conditions as to diameter and length of ferrule.

My invention aims also to'providel various improvements specified in detail hereinafter.

Referring to the accompanying drawings, illustrating an embodiment of my invention, Figure l is a longitudinal' section of a complete apparatus, partly in eleva-tion. Fig. 2 is a rear end view of the same. Fig. 3 is a front end view of the same. Fig. 4 isa view of a collet taken out of the shell. Fig. 5 illustrates the application of the apparatus/to the applying of a ferrule to the valve-tube of a pneumatic tire. Fig. 6 is a section on the line 6 6 of Fig. 5.

My improved apparatus operates by compressing the ferrule upon the compressible tube, it being understood that the latter has in nearly all cases arigid core therein which prevent-s collapsing of the tube. For example, in the case illustrated this core is formed by the metallic inner end of the valve-casing. In a hose the core would ordinarily be the inner portion of the nozzle or couplingtube attached. The inward pressure is preferably produced by jaws which contract the fer-rule radially and substantially equally at 'all points without corrugating it.v Prefereach other the jaws are pressed inwardly. Il

preferably use also in connection with means for contracting the ferrule a stop for determining the longitudinal position of the ferrule'and tube relatively to the contracting means, the stop being preferably adjustable i to fit it for operation under varying conditions.

Referring to the drawings, A represents a collet (shown separately in Fig. 4f) and comprising, preferably, a ring B at one end and a series of jaw C, all of said parts being integral. The jaws C are thickened near their outer ends, where the greatest strain comes on them, and for carrying out the process of my aforesaid application are preferably provided with pressing-faces D of the shape illustrated and adapted when pressed inward, Fig. 6, to form a continuous pressingface without corrugations. The entire collet is preferably made of a single-piece of tempered tool-steel and with the jaws spread slightly apart, as indicated in Fig. 4. The outer faces E of. the jaws C, near their ends, are tapered, as indicated, and are arranged for longitudinal reciprocation in a ring F, which has a correspondingly-tapered inner face surrounding the faces E of the jaws. A shell G receives the collet and in its outer enlarged end receives the ring F, the latter being preferably screwed. therein, as shown. The shell is preferably provided With a standard H, integraltherewith, by which it may be attached to a work-table or the like.

The means for giving the collet the necessary longitudinal movement to press the jaws inward and contract the ferrule consists of a shaft J, screwing into the shell G and bearing against the ring B of the collet, preferably through the intermediation of a ring K, which lessons the twisting tendency on the collet and reduces the wear on the same. As the shaft J is turned in one direction the being first removed. The turning of the shaftV is effected, preferably, by means of a lever L, clamped on the rear portion thereof. The lever will ordinarily stand in the vertical position illustrated and will be pulled downward in the direction indicated by the arrow, Fig. 2, until the arm M thereon strikes a stop N, which is preferably a screw entering the outside of the shell G at a suitable point. Vith collets of different proportions it is advisable to vary the position of the operating-shaft J relatively to the lever L, rather than make it necessary to turn the lever L to an inconvenient position in order to effect the complete movement. For this purpose an adjustable connection is provided between the shaft and the lever, consisting, preferably, of a pin O in the hub of the lever, adapted to enter any one of a series of apertures P in a ange Q on the screw-shaft. To effect the desired adjustment, the clampingscrew R is loosened and the -lever L withdrawn longitudinally from the flange Q. Then holding the lever L in the position assumed at the end of its stroke, with the arm M against the stop N, the shaft is turned by means of its knurled end S until the jaws C are brought to the desired final position. The lever L is then moved up against the flange Q of the shaft, with its pin O in the nearest hole P, and the screw R tightened to clamp it.

A feature of the invention which is of use not only in connection with the specific compressing means indicated,but with other types of compressing means, is a stop for determining the longitudinal position of the ferrule and tube relatively to the compressing means and which in the form illustrated is longitudinally adjustable. In the present caseI have also shown this stop movable longitudinally and simultaneously with the compressingjaws, so lthat a corresponding longitudinal movement is given to the tube and ferrule, and these parts receive only an inward pressure from said jaws. This stop in the present case consists of a rod T, preferably having an enlarged head U and adapted to be adjustably attached to the shaft J to operatein the manner described by having its rear portion passing through the shaft J and fixed in position therein by means of a set-screw V.

The operation of the device in applying a ferrule to the valve-tube of a pneumatic tire is illustrated in Figs. 5 and 6, in which W is the valve-tube,of rubber, X is a portion of the valve-casing which is to be fastened into the tube W, and Y is the ferrule, the outer edge of which is preferably turned inward, as shown, o ver the end of the tube and the inner edge of which is preferably slightly flared to avoid cutting the rubber, this flare being formed by a flare Z at the outer end of the jaws. In inserting the tube into the machine the rod T is rst loosened by unscrewing the set-screw V, and the tube is then pressed inward, the en d of the valve member X bearing against the head U of the rod T and pushing the latter back until the ferrule is properly located within the jaws. The set-screw V is then tightened to x the position of the head U relatively to the jaws. The leverL is then pulled down, as explained, and the jaws, rod, tube, and ferrule are pushed forward simultaneously, the jaws being at the same time pressed inward to contract the ferrule, as explained. After one adjustment of the rod T it of course remains fixed for subsequent operations upon duplicate tubes and serves to determine without any care on the part of the operator when the tube is placed far enough into the machine.

Though I have described with great particularity of detail an apparatus embodying my invention, yet it will be understood that the invention is not limited to the specific apparatus described. Various modifications and rearrangements of the parts are possible to those skilled in the art without departure from the invention. For example, although my apparatus is designed to contract a ferrule without corrugating it, yet I have found in practice that, especially where the ferrule is too large for the tube, there is sometimes a slight fold in the metal after contraction. This fold is slight and unintentional and is not a necessary incident of the operation of my machine; but it is to be understood, of course,that whether the machine operates perfectly as designed or imperfectly it is equally within the broad invention.

What I claim is-l 1. In an apparatus for radially contracting on a compressible tube at substantially all parts of its circumference a continuous cylindrical sheet-metal ferrule so as to convert it into a similar continuous cylindrical sheetmetal ferrule of smaller diameter, the combination of a series of jaws adapted to surround snch ferrule, and means for pressing said jaws inward to form a substantially con- A tinuous pressing face around said ferrule whereby to contract said ferrule on the tube Without corrugating it.

2. In an apparatus for applying a ferrule to a compressible tube, the combination of a series of jaws adapted to surround such fer- IOO IlO

rule, means for pressing said jaws inward by a longitudinal movement thereof, and means for giving said tube and ferrule a longitudinal movement simultaneously with that of said jaws so that they receive only an inward pressure from said jaws.

, 3. In an apparatus for applying a ferrule to a compressible tube,the combination of a series of jaws adapted to surround such ferrule and having inclined outer faces, Va ring surrounding said jaws and having a correspondingly-inclined inner face, a screw-shaft for giving said jaws a longitudinal movement in said ring whereby they are pressed inward, and a lever for rotating said screw-shaft.

4; In an apparatus for applying a ferrule to a compressible tube, the combination of a series of jaws adapted to surround such ferrule and having inclined outer faces, a ring surrounding said Vjaws and having a correspondingly-inclined inner face, a screw-shaft for giving said jaws a longitudinal movement in said ring whereby they are pressed inward, a lever for rotating said screw-shaft, and means for connecting said lever adjustably to said shaft.

5. In an apparatus for applying a ferrule to a compressible tube, the combination of a collet consisting of a ring and a series of jaws, said jaws having inclined outer faces, a second ring adapted to surround said jaws and having a correspondingly-inclined inner face, a screw-shaft adapted to move said jaws longitudinally of said ring to press the same inward, and ashell carrying said collet, and carrying said screw-shaft at one end and said second ring at the opposite end.

6. In an apparatus for applying a ferrule to a compressible tube, the combination of a Y collet consisting of a ring and a series of jaws,

a screw-shaft for giving said collet a longitudinal movement, and a ring K interposed between said collet and screw-shaft.

7. In an apparatus for applying a ferrule to the outside of acompressible tube, the combination of means for contracting such ferrule on the tube, and a stop for determining the longitudinal position of the ferrule and tube relatively to said contracting means.

8. In an apparatus for applying a ferrule to a compressible tube, the combination of means for contracting such ferrule on the tube, and an adjustable stop for determining the longitudinal position of the ferrule and tube relatively to said contracting means.

9. In an apparatus for applying a ferrule to a compressible tube, the combination of a series of jaws adapted to surround such ferrule, means for pressing said jawsinward by a longitudinal movement thereof, a longitudinally movable shaft for producing said movement of the jaws, and a rod attached to said shaft and movable therewith for giving said tube and ferrule a simultaneous longitudinal movement. c

l0. In an apparatus for applying a ferrule to a compressible tube, the combination of a series of jaws adapted to surround such ferrule, means for pressing said jaws inward by a longitudinal movement thereof, a longitudinally movable shaft for producing said movement, and a rod connected to said shaft and adjustable longitudinally thereof and adapted to give said tube and ferrule a longitudinal movement simultaneously with that of said jaws.

ll. In an apparatus for radially contracting on a compressible tube at substantially all parts of its circumference a continuous cylindrical sheet-metal ferrule without corrugating it so as to convert it into a similar continuous cylindrical sheet metal ferrule of smaller diameter, the combination with a collet consisting of a ring and a series of jaws having inside pressing-faces shaped to form, when pressed inward around said ferrule, a continuous pressing-face without corrugations, of means for pressing said jaws inward around a ferrule.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

GEORGE H. F. SOHRADER. 

